NOVA"Extreme Cave Diving"
Cave diver and environmental anthropologist Kenny Broad heads an interdisciplinary team of climatologists, paleontologists and anthropologists into underwater caves, or blue holes, formed during the last ice age. Broad is investigating the hidden history of Earth's climate as revealed by finds in this "alternate universe."G

6:00 pm

Cave People of the Himalaya
Everest climber Pete Athans belays archaeologist Mark Aldenerfer down an 800-foot-cliff to a cave 700 feet down from the top. The two of them are on a mission in the world's highest mountains to find ancient mummies and uncover secrets hidden thousands of years in these cliff-top graves.G

7:00 pm

NOVA scienceNOW"Can I Eat That?"
David Pogue, popular technology reporter for The New York Times, is the new host of this science magazine series. What are the secrets behind your favorite foods? Why are some treats -- like chocolate chip cookies -- delectable, while others -- like cookies made with mealworms -- disgusting? You might think you understand what makes something sweet, salty or bitter, but Pogue gets a taste of a much more complicated truth, as he ventures into labs and kitchens where everything from apple pie to Thanksgiving turkey to juicy grasshoppers is diced, sliced, dissected and put under the microscope. If scientists can uncover exactly what's behind the mouth-watering flavors and textures we take for granted every day, could they help us enjoy our food more -- without packing on the pounds?. D

Nightly Business Report
Tonight on Nightly Business Report - stocks, bonds and commodities suffer huge losses after yesterday's Fed statement. What do investors do now? One bright spot - housing. Sales spike and prices rise, but one set of buyers is on the outside looking in. D

Cave People of the Himalaya
Everest climber Pete Athans belays archaeologist Mark Aldenerfer down an 800-foot-cliff to a cave 700 feet down from the top. The two of them are on a mission in the world's highest mountains to find ancient mummies and uncover secrets hidden thousands of years in these cliff-top graves.G